- April 1, 1980
- April 2, 1980
- April 3, 1980
- April 4, 1980
- April 5, 1980
- April 6, 1980 (This Sunday strip and the following two strips are adapted as the segment "Caddies" in It's an Adventure, Charlie Brown)
- April 7, 1980
- April 8, 1980
- April 9, 1980
- April 10, 1980
- April 11, 1980 (This strip and the following strip shows Snoopy on second base, although he usually plays shortshop on Charlie Brown's baseball team)
- April 12, 1980
- April 13, 1980
- April 14, 1980
- April 15, 1980
- April 16, 1980
- April 17, 1980
- April 18, 1980
- April 19, 1980
- April 20, 1980
- April 21, 1980
- April 22, 1980
- April 23, 1980 (This strip is adapted in It's Spring Training, Charlie Brown)
- April 24, 1980
- April 25, 1980
- April 26, 1980
- April 27, 1980 (The last strip involving the "Pig-Pen"/Peppermint Patty romance. This strip is adapted in the episode "Love Is in the Air" from the 2014 French TV series Peanuts)
- April 28, 1980
- April 29, 1980
- April 30, 1980
| ← March 1980 | May 1980 → |